const https = require('https');
const cheerio = require('cheerio');
const http = require('http');
const fs = require('fs');

async function getHttp(url) {
    return new Promise((resolve, reject) => {
        http.get(url, (res) => {
            let rawData = '';
            res.on('data', (chunk) => { rawData += chunk; })
            res.on('end', async() => {
                resolve(rawData);
            });
        })
    })
}


//Lấy link tất các link trong list url

async function listURLOf() {

    let html = await getHttp('http://thuoctot24h.com/');
    const $ = await cheerio.load(html);

    var listURL1 = [];

    const temp = $('#header-row-29 > div > div > div > div > ul > li:nth-child(3) > ul > li:nth-child(1)');

    while (temp[0].name == 'li') {
        listURL1.push(temp[0].children[1].attribs.href);
        if (temp[0].next == null)
            break;
        temp[0] = temp[0].next;

    }
    return listURL1;

}

// Lấy các link cac page trong list url
async function listURLOf1(link) {

    var listURL = [];
    let html = await getHttp(link);
    const $ = await cheerio.load(html);

    const selecTenSP = $('div.list-item');
    for (var i = 0; i < selecTenSP.length; i++) {
        listURL.push(selecTenSP[i].children[0].children[0].children[1].attribs.href);
    }

    return listURL;

}

//lay thông tin sản phẩm
async function inforProduct(link) {

    try {
        let html = await getHttp(link);
        const $ = await cheerio.load(html);

        //ten thuoc
        const selecTenSP = $('h1.title-name-product');
        var tenSP = selecTenSP[0].children[0].data;
        console.log(tenSP);



        //Gia

        const selecGiaSP = $('span.lb-price.price-main');
        if (selecGiaSP[0] != null) {
            var giaSP = selecGiaSP[0].children[0].data;


        } else {
            var giaSP = null;
        }


        var selec = $('#content > h2');
        var motChiMuc = [];

        for (var i = 0; i < selec.length; i++) {
            var line = [];
            while (selec[i].next.name == 'p') {
                if (selec[i].next.children[0].data != null)
                    line.push(selec[i].next.children[0].data);
                selec[i] = selec[i].next;
                if (selec[i].next == null)
                    break;
            }
            motChiMuc.push(line);

        }

        //Thanh phan
        var listThanhPhan = [];
        const temp = $('#content > table');
        if (temp[0] != null) {
            const selecTable = $('#content > table>tbody>tr:nth-child(1)');
            var line = [];
            while (selecTable[0].name == 'tr') {


                for (var i = 0; i < selecTable[0].children.length; i++) {
                    line.push(selecTable[0].children[i].children[0].data);
                }


                if (selecTable[0].next == null)
                    break;
                selecTable[0] = selecTable[0].next;
            } //end while            

            listThanhPhan.push(line);

        } else {
            listThanhPhan = motChiMuc[1];

        }


        var congDung = motChiMuc[0];
        var doiTuongSD = motChiMuc[2];
        var cachSD = motChiMuc[3];
        var nguonGoc = motChiMuc[4];


        var data = {
            ten: tenSP,
            gia: giaSP,
            thanhPhan: listThanhPhan,
            congDung: congDung,
            doiTuongSD: doiTuongSD,
            cachSuDung: cachSD,
            thongTinSP: nguonGoc
        };

        const str = JSON.stringify(data);
        console.log(str);
        console.log('Mot san pham-----------');
        return str;


    } catch (error) {
        console.log(motPhanTu);
        console.log(error);

    }



}




async function main() {

    var inforAll = [];
    var list = await listURLOf();
    list01 = [];
    for (var itemp = 0; itemp < list.length; itemp++) {
        var listURL = await listURLOf1(list[itemp]);
        list01.push(listURL);
    }



    list01.forEach(async function(motPhanTu) {

        for (var i = 0; i < motPhanTu.length; i++) {
            var thongTinMotSanPham = await inforProduct(motPhanTu[i]);
            inforAll.push(thongTinMotSanPham);

        }
    })



}
//end main

main();